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[cor_2_6_31.git] / drivers / hid / usbhid / hid-core.c
blob3c1fcb7640abe1458d52146f8456c16295ec531f
1 /*
2 * USB HID support for Linux
3 *
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2006-2008 Jiri Kosina
8 * Copyright (c) 2007-2008 Oliver Neukum
9 */
10
11 /*
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
15 * any later version.
16 */
17
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/list.h>
23 #include <linux/mm.h>
24 #include <linux/mutex.h>
25 #include <linux/spinlock.h>
26 #include <asm/unaligned.h>
27 #include <asm/byteorder.h>
28 #include <linux/input.h>
29 #include <linux/wait.h>
30 #include <linux/workqueue.h>
31
32 #include <linux/usb.h>
33
34 #include <linux/hid.h>
35 #include <linux/hiddev.h>
36 #include <linux/hid-debug.h>
37 #include <linux/hidraw.h>
38 #include "usbhid.h"
39
40 /*
41 * Version Information
42 */
43
44 #define DRIVER_VERSION "v2.6"
45 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
46 #define DRIVER_DESC "USB HID core driver"
47 #define DRIVER_LICENSE "GPL"
48
49 /*
50 * Module parameters.
51 */
52
53 static unsigned int hid_mousepoll_interval;
54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
56
57 static unsigned int ignoreled;
58 module_param_named(ignoreled, ignoreled, uint, 0644);
59 MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
60
61 /* Quirks specified at module load time */
62 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
63 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
64 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
65 " quirks=vendorID:productID:quirks"
66 " where vendorID, productID, and quirks are all in"
67 " 0x-prefixed hex");
68 /*
69 * Input submission and I/O error handler.
70 */
71 static DEFINE_MUTEX(hid_open_mut);
72 static struct workqueue_struct *resumption_waker;
73
74 static void hid_io_error(struct hid_device *hid);
75 static int hid_submit_out(struct hid_device *hid);
76 static int hid_submit_ctrl(struct hid_device *hid);
77 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
78
79 /* Start up the input URB */
80 static int hid_start_in(struct hid_device *hid)
81 {
82 unsigned long flags;
83 int rc = 0;
84 struct usbhid_device *usbhid = hid->driver_data;
85
86 spin_lock_irqsave(&usbhid->lock, flags);
87 if (hid->open > 0 &&
88 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
89 !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
90 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
91 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
92 if (rc != 0)
93 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
94 }
95 spin_unlock_irqrestore(&usbhid->lock, flags);
96 return rc;
97 }
98
99 /* I/O retry timer routine */
100 static void hid_retry_timeout(unsigned long _hid)
101 {
102 struct hid_device *hid = (struct hid_device *) _hid;
103 struct usbhid_device *usbhid = hid->driver_data;
104
105 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
106 if (hid_start_in(hid))
107 hid_io_error(hid);
108 }
109
110 /* Workqueue routine to reset the device or clear a halt */
111 static void hid_reset(struct work_struct *work)
112 {
113 struct usbhid_device *usbhid =
114 container_of(work, struct usbhid_device, reset_work);
115 struct hid_device *hid = usbhid->hid;
116 int rc = 0;
117
118 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
119 dev_dbg(&usbhid->intf->dev, "clear halt\n");
120 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
121 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
122 hid_start_in(hid);
123 }
124
125 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
126 dev_dbg(&usbhid->intf->dev, "resetting device\n");
127 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
128 if (rc == 0) {
129 rc = usb_reset_device(hid_to_usb_dev(hid));
130 usb_unlock_device(hid_to_usb_dev(hid));
131 }
132 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
133 }
134
135 switch (rc) {
136 case 0:
137 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
138 hid_io_error(hid);
139 break;
140 default:
141 err_hid("can't reset device, %s-%s/input%d, status %d",
142 hid_to_usb_dev(hid)->bus->bus_name,
143 hid_to_usb_dev(hid)->devpath,
144 usbhid->ifnum, rc);
145 /* FALLTHROUGH */
146 case -EHOSTUNREACH:
147 case -ENODEV:
148 case -EINTR:
149 break;
150 }
151 }
152
153 /* Main I/O error handler */
154 static void hid_io_error(struct hid_device *hid)
155 {
156 unsigned long flags;
157 struct usbhid_device *usbhid = hid->driver_data;
158
159 spin_lock_irqsave(&usbhid->lock, flags);
160
161 /* Stop when disconnected */
162 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
163 goto done;
164
165 /* If it has been a while since the last error, we'll assume
166 * this a brand new error and reset the retry timeout. */
167 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
168 usbhid->retry_delay = 0;
169
170 /* When an error occurs, retry at increasing intervals */
171 if (usbhid->retry_delay == 0) {
172 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
173 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
174 } else if (usbhid->retry_delay < 100)
175 usbhid->retry_delay *= 2;
176
177 if (time_after(jiffies, usbhid->stop_retry)) {
178
179 /* Retries failed, so do a port reset */
180 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
181 schedule_work(&usbhid->reset_work);
182 goto done;
183 }
184 }
185
186 mod_timer(&usbhid->io_retry,
187 jiffies + msecs_to_jiffies(usbhid->retry_delay));
188 done:
189 spin_unlock_irqrestore(&usbhid->lock, flags);
190 }
191
192 static void usbhid_mark_busy(struct usbhid_device *usbhid)
193 {
194 struct usb_interface *intf = usbhid->intf;
195
196 usb_mark_last_busy(interface_to_usbdev(intf));
197 }
198
199 static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
200 {
201 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
202 int kicked;
203
204 if (!hid)
205 return 0;
206
207 if ((kicked = (usbhid->outhead != usbhid->outtail))) {
208 dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
209 if (hid_submit_out(hid)) {
210 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
211 wake_up(&usbhid->wait);
212 }
213 }
214 return kicked;
215 }
216
217 static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
218 {
219 struct hid_device *hid = usb_get_intfdata(usbhid->intf);
220 int kicked;
221
222 WARN_ON(hid == NULL);
223 if (!hid)
224 return 0;
225
226 if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
227 dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
228 if (hid_submit_ctrl(hid)) {
229 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
230 wake_up(&usbhid->wait);
231 }
232 }
233 return kicked;
234 }
235
236 /*
237 * Input interrupt completion handler.
238 */
239
240 static void hid_irq_in(struct urb *urb)
241 {
242 struct hid_device *hid = urb->context;
243 struct usbhid_device *usbhid = hid->driver_data;
244 int status;
245
246 switch (urb->status) {
247 case 0: /* success */
248 usbhid_mark_busy(usbhid);
249 usbhid->retry_delay = 0;
250 hid_input_report(urb->context, HID_INPUT_REPORT,
251 urb->transfer_buffer,
252 urb->actual_length, 1);
253 /*
254 * autosuspend refused while keys are pressed
255 * because most keyboards don't wake up when
256 * a key is released
257 */
258 if (hid_check_keys_pressed(hid))
259 set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
260 else
261 clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
262 break;
263 case -EPIPE: /* stall */
264 usbhid_mark_busy(usbhid);
265 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
266 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
267 schedule_work(&usbhid->reset_work);
268 return;
269 case -ECONNRESET: /* unlink */
270 case -ENOENT:
271 case -ESHUTDOWN: /* unplug */
272 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
273 return;
274 case -EILSEQ: /* protocol error or unplug */
275 case -EPROTO: /* protocol error or unplug */
276 case -ETIME: /* protocol error or unplug */
277 case -ETIMEDOUT: /* Should never happen, but... */
278 usbhid_mark_busy(usbhid);
279 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
280 hid_io_error(hid);
281 return;
282 default: /* error */
283 dev_warn(&urb->dev->dev, "input irq status %d "
284 "received\n", urb->status);
285 }
286
287 status = usb_submit_urb(urb, GFP_ATOMIC);
288 if (status) {
289 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
290 if (status != -EPERM) {
291 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
292 hid_to_usb_dev(hid)->bus->bus_name,
293 hid_to_usb_dev(hid)->devpath,
294 usbhid->ifnum, status);
295 hid_io_error(hid);
296 }
297 }
298 }
299
300 static int hid_submit_out(struct hid_device *hid)
301 {
302 struct hid_report *report;
303 char *raw_report;
304 struct usbhid_device *usbhid = hid->driver_data;
305
306 report = usbhid->out[usbhid->outtail].report;
307 raw_report = usbhid->out[usbhid->outtail].raw_report;
308
309 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
310 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
311 usbhid->urbout->dev = hid_to_usb_dev(hid);
312 memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
313 kfree(raw_report);
314
315 dbg_hid("submitting out urb\n");
316
317 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
318 err_hid("usb_submit_urb(out) failed");
319 return -1;
320 }
321 } else {
322 /*
323 * queue work to wake up the device.
324 * as the work queue is freezeable, this is safe
325 * with respect to STD and STR
326 */
327 queue_work(resumption_waker, &usbhid->restart_work);
328 }
329
330 return 0;
331 }
332
333 static int hid_submit_ctrl(struct hid_device *hid)
334 {
335 struct hid_report *report;
336 unsigned char dir;
337 char *raw_report;
338 int len;
339 struct usbhid_device *usbhid = hid->driver_data;
340
341 report = usbhid->ctrl[usbhid->ctrltail].report;
342 raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
343 dir = usbhid->ctrl[usbhid->ctrltail].dir;
344
345 if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
346 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
347 if (dir == USB_DIR_OUT) {
348 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
349 usbhid->urbctrl->transfer_buffer_length = len;
350 memcpy(usbhid->ctrlbuf, raw_report, len);
351 kfree(raw_report);
352 } else {
353 int maxpacket, padlen;
354
355 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
356 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
357 if (maxpacket > 0) {
358 padlen = DIV_ROUND_UP(len, maxpacket);
359 padlen *= maxpacket;
360 if (padlen > usbhid->bufsize)
361 padlen = usbhid->bufsize;
362 } else
363 padlen = 0;
364 usbhid->urbctrl->transfer_buffer_length = padlen;
365 }
366 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
367
368 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
369 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
370 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
371 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
372 usbhid->cr->wLength = cpu_to_le16(len);
373
374 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
375 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
376 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
377
378 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
379 err_hid("usb_submit_urb(ctrl) failed");
380 return -1;
381 }
382 } else {
383 /*
384 * queue work to wake up the device.
385 * as the work queue is freezeable, this is safe
386 * with respect to STD and STR
387 */
388 queue_work(resumption_waker, &usbhid->restart_work);
389 }
390
391 return 0;
392 }
393
394 /*
395 * Output interrupt completion handler.
396 */
397
398 static void hid_irq_out(struct urb *urb)
399 {
400 struct hid_device *hid = urb->context;
401 struct usbhid_device *usbhid = hid->driver_data;
402 unsigned long flags;
403 int unplug = 0;
404
405 switch (urb->status) {
406 case 0: /* success */
407 break;
408 case -ESHUTDOWN: /* unplug */
409 unplug = 1;
410 case -EILSEQ: /* protocol error or unplug */
411 case -EPROTO: /* protocol error or unplug */
412 case -ECONNRESET: /* unlink */
413 case -ENOENT:
414 break;
415 default: /* error */
416 dev_warn(&urb->dev->dev, "output irq status %d "
417 "received\n", urb->status);
418 }
419
420 spin_lock_irqsave(&usbhid->lock, flags);
421
422 if (unplug)
423 usbhid->outtail = usbhid->outhead;
424 else
425 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
426
427 if (usbhid->outhead != usbhid->outtail) {
428 if (hid_submit_out(hid)) {
429 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
430 wake_up(&usbhid->wait);
431 }
432 spin_unlock_irqrestore(&usbhid->lock, flags);
433 return;
434 }
435
436 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
437 spin_unlock_irqrestore(&usbhid->lock, flags);
438 wake_up(&usbhid->wait);
439 }
440
441 /*
442 * Control pipe completion handler.
443 */
444
445 static void hid_ctrl(struct urb *urb)
446 {
447 struct hid_device *hid = urb->context;
448 struct usbhid_device *usbhid = hid->driver_data;
449 int unplug = 0, status = urb->status;
450
451 spin_lock(&usbhid->lock);
452
453 switch (status) {
454 case 0: /* success */
455 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
456 hid_input_report(urb->context,
457 usbhid->ctrl[usbhid->ctrltail].report->type,
458 urb->transfer_buffer, urb->actual_length, 0);
459 break;
460 case -ESHUTDOWN: /* unplug */
461 unplug = 1;
462 case -EILSEQ: /* protocol error or unplug */
463 case -EPROTO: /* protocol error or unplug */
464 case -ECONNRESET: /* unlink */
465 case -ENOENT:
466 case -EPIPE: /* report not available */
467 break;
468 default: /* error */
469 dev_warn(&urb->dev->dev, "ctrl urb status %d "
470 "received\n", status);
471 }
472
473 if (unplug)
474 usbhid->ctrltail = usbhid->ctrlhead;
475 else
476 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
477
478 if (usbhid->ctrlhead != usbhid->ctrltail) {
479 if (hid_submit_ctrl(hid)) {
480 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
481 wake_up(&usbhid->wait);
482 }
483 spin_unlock(&usbhid->lock);
484 return;
485 }
486
487 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
488 spin_unlock(&usbhid->lock);
489 wake_up(&usbhid->wait);
490 }
491
492 void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
493 {
494 int head;
495 struct usbhid_device *usbhid = hid->driver_data;
496 int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
497
498 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
499 return;
500
501 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
502 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
503 dev_warn(&hid->dev, "output queue full\n");
504 return;
505 }
506
507 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
508 if (!usbhid->out[usbhid->outhead].raw_report) {
509 dev_warn(&hid->dev, "output queueing failed\n");
510 return;
511 }
512 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
513 usbhid->out[usbhid->outhead].report = report;
514 usbhid->outhead = head;
515
516 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
517 if (hid_submit_out(hid))
518 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
519 return;
520 }
521
522 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
523 dev_warn(&hid->dev, "control queue full\n");
524 return;
525 }
526
527 if (dir == USB_DIR_OUT) {
528 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
529 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
530 dev_warn(&hid->dev, "control queueing failed\n");
531 return;
532 }
533 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
534 }
535 usbhid->ctrl[usbhid->ctrlhead].report = report;
536 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
537 usbhid->ctrlhead = head;
538
539 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
540 if (hid_submit_ctrl(hid))
541 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
542 }
543
544 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
545 {
546 struct usbhid_device *usbhid = hid->driver_data;
547 unsigned long flags;
548
549 spin_lock_irqsave(&usbhid->lock, flags);
550 __usbhid_submit_report(hid, report, dir);
551 spin_unlock_irqrestore(&usbhid->lock, flags);
552 }
553 EXPORT_SYMBOL_GPL(usbhid_submit_report);
554
555 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
556 {
557 struct hid_device *hid = input_get_drvdata(dev);
558 struct usbhid_device *usbhid = hid->driver_data;
559 struct hid_field *field;
560 unsigned long flags;
561 int offset;
562
563 if (type == EV_FF)
564 return input_ff_event(dev, type, code, value);
565
566 if (type != EV_LED)
567 return -1;
568
569 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
570 dev_warn(&dev->dev, "event field not found\n");
571 return -1;
572 }
573
574 hid_set_field(field, offset, value);
575 if (value) {
576 spin_lock_irqsave(&usbhid->lock, flags);
577 usbhid->ledcount++;
578 spin_unlock_irqrestore(&usbhid->lock, flags);
579 } else {
580 spin_lock_irqsave(&usbhid->lock, flags);
581 usbhid->ledcount--;
582 spin_unlock_irqrestore(&usbhid->lock, flags);
583 }
584 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
585
586 return 0;
587 }
588
589 int usbhid_wait_io(struct hid_device *hid)
590 {
591 struct usbhid_device *usbhid = hid->driver_data;
592
593 if (!wait_event_timeout(usbhid->wait,
594 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
595 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
596 10*HZ)) {
597 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
598 return -1;
599 }
600
601 return 0;
602 }
603
604 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
605 {
606 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
607 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
608 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
609 }
610
611 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
612 unsigned char type, void *buf, int size)
613 {
614 int result, retries = 4;
615
616 memset(buf, 0, size);
617
618 do {
619 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
620 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
621 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
622 retries--;
623 } while (result < size && retries);
624 return result;
625 }
626
627 int usbhid_open(struct hid_device *hid)
628 {
629 struct usbhid_device *usbhid = hid->driver_data;
630 int res;
631
632 mutex_lock(&hid_open_mut);
633 if (!hid->open++) {
634 res = usb_autopm_get_interface(usbhid->intf);
635 /* the device must be awake to reliable request remote wakeup */
636 if (res < 0) {
637 hid->open--;
638 mutex_unlock(&hid_open_mut);
639 return -EIO;
640 }
641 usbhid->intf->needs_remote_wakeup = 1;
642 if (hid_start_in(hid))
643 hid_io_error(hid);
644
645 usb_autopm_put_interface(usbhid->intf);
646 }
647 mutex_unlock(&hid_open_mut);
648 return 0;
649 }
650
651 void usbhid_close(struct hid_device *hid)
652 {
653 struct usbhid_device *usbhid = hid->driver_data;
654
655 mutex_lock(&hid_open_mut);
656
657 /* protecting hid->open to make sure we don't restart
658 * data acquistion due to a resumption we no longer
659 * care about
660 */
661 spin_lock_irq(&usbhid->lock);
662 if (!--hid->open) {
663 spin_unlock_irq(&usbhid->lock);
664 hid_cancel_delayed_stuff(usbhid);
665 usb_kill_urb(usbhid->urbin);
666 usbhid->intf->needs_remote_wakeup = 0;
667 } else {
668 spin_unlock_irq(&usbhid->lock);
669 }
670 mutex_unlock(&hid_open_mut);
671 }
672
673 /*
674 * Initialize all reports
675 */
676
677 void usbhid_init_reports(struct hid_device *hid)
678 {
679 struct hid_report *report;
680 struct usbhid_device *usbhid = hid->driver_data;
681 int err, ret;
682
683 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
684 usbhid_submit_report(hid, report, USB_DIR_IN);
685
686 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
687 usbhid_submit_report(hid, report, USB_DIR_IN);
688
689 err = 0;
690 ret = usbhid_wait_io(hid);
691 while (ret) {
692 err |= ret;
693 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
694 usb_kill_urb(usbhid->urbctrl);
695 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
696 usb_kill_urb(usbhid->urbout);
697 ret = usbhid_wait_io(hid);
698 }
699
700 if (err)
701 dev_warn(&hid->dev, "timeout initializing reports\n");
702 }
703
704 /*
705 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
706 */
707 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
708 unsigned int hid_code, struct hid_field **pfield)
709 {
710 struct hid_report *report;
711 struct hid_field *field;
712 struct hid_usage *usage;
713 int i, j;
714
715 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
716 for (i = 0; i < report->maxfield; i++) {
717 field = report->field[i];
718 for (j = 0; j < field->maxusage; j++) {
719 usage = &field->usage[j];
720 if ((usage->hid & HID_USAGE_PAGE) == page &&
721 (usage->hid & 0xFFFF) == hid_code) {
722 *pfield = field;
723 return j;
724 }
725 }
726 }
727 }
728 return -1;
729 }
730
731 void usbhid_set_leds(struct hid_device *hid)
732 {
733 struct hid_field *field;
734 int offset;
735
736 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
737 hid_set_field(field, offset, 0);
738 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
739 }
740 }
741 EXPORT_SYMBOL_GPL(usbhid_set_leds);
742
743 /*
744 * Traverse the supplied list of reports and find the longest
745 */
746 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
747 unsigned int *max)
748 {
749 struct hid_report *report;
750 unsigned int size;
751
752 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
753 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
754 if (*max < size)
755 *max = size;
756 }
757 }
758
759 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
760 {
761 struct usbhid_device *usbhid = hid->driver_data;
762
763 usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
764 &usbhid->inbuf_dma);
765 usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
766 &usbhid->outbuf_dma);
767 usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
768 &usbhid->cr_dma);
769 usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
770 &usbhid->ctrlbuf_dma);
771 if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
772 !usbhid->ctrlbuf)
773 return -1;
774
775 return 0;
776 }
777
778 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
779 {
780 struct usbhid_device *usbhid = hid->driver_data;
781 struct usb_device *dev = hid_to_usb_dev(hid);
782 struct usb_interface *intf = usbhid->intf;
783 struct usb_host_interface *interface = intf->cur_altsetting;
784 int ret;
785
786 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
787 HID_REQ_SET_REPORT,
788 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
789 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
790 interface->desc.bInterfaceNumber, buf + 1, count - 1,
791 USB_CTRL_SET_TIMEOUT);
792
793 /* count also the report id */
794 if (ret > 0)
795 ret++;
796
797 return ret;
798 }
799
800 static void usbhid_restart_queues(struct usbhid_device *usbhid)
801 {
802 if (usbhid->urbout)
803 usbhid_restart_out_queue(usbhid);
804 usbhid_restart_ctrl_queue(usbhid);
805 }
806
807 static void __usbhid_restart_queues(struct work_struct *work)
808 {
809 struct usbhid_device *usbhid =
810 container_of(work, struct usbhid_device, restart_work);
811 int r;
812
813 r = usb_autopm_get_interface(usbhid->intf);
814 if (r < 0)
815 return;
816 usb_autopm_put_interface(usbhid->intf);
817 }
818
819 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
820 {
821 struct usbhid_device *usbhid = hid->driver_data;
822
823 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
824 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
825 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
826 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
827 }
828
829 static int usbhid_parse(struct hid_device *hid)
830 {
831 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
832 struct usb_host_interface *interface = intf->cur_altsetting;
833 struct usb_device *dev = interface_to_usbdev (intf);
834 struct hid_descriptor *hdesc;
835 u32 quirks = 0;
836 unsigned int rsize = 0;
837 char *rdesc;
838 int ret, n;
839
840 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
841 le16_to_cpu(dev->descriptor.idProduct));
842
843 if (quirks & HID_QUIRK_IGNORE)
844 return -ENODEV;
845
846 /* Many keyboards and mice don't like to be polled for reports,
847 * so we will always set the HID_QUIRK_NOGET flag for them. */
848 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
849 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
850 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
851 quirks |= HID_QUIRK_NOGET;
852 }
853
854 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
855 (!interface->desc.bNumEndpoints ||
856 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
857 dbg_hid("class descriptor not present\n");
858 return -ENODEV;
859 }
860
861 hid->version = le16_to_cpu(hdesc->bcdHID);
862 hid->country = hdesc->bCountryCode;
863
864 for (n = 0; n < hdesc->bNumDescriptors; n++)
865 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
866 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
867
868 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
869 dbg_hid("weird size of report descriptor (%u)\n", rsize);
870 return -EINVAL;
871 }
872
873 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
874 dbg_hid("couldn't allocate rdesc memory\n");
875 return -ENOMEM;
876 }
877
878 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
879
880 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
881 HID_DT_REPORT, rdesc, rsize);
882 if (ret < 0) {
883 dbg_hid("reading report descriptor failed\n");
884 kfree(rdesc);
885 goto err;
886 }
887
888 dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
889 for (n = 0; n < rsize; n++)
890 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
891 dbg_hid_line("\n");
892
893 ret = hid_parse_report(hid, rdesc, rsize);
894 kfree(rdesc);
895 if (ret) {
896 dbg_hid("parsing report descriptor failed\n");
897 goto err;
898 }
899
900 hid->quirks |= quirks;
901
902 return 0;
903 err:
904 return ret;
905 }
906
907 static int usbhid_start(struct hid_device *hid)
908 {
909 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
910 struct usb_host_interface *interface = intf->cur_altsetting;
911 struct usb_device *dev = interface_to_usbdev(intf);
912 struct usbhid_device *usbhid = hid->driver_data;
913 unsigned int n, insize = 0;
914 int ret;
915
916 clear_bit(HID_DISCONNECTED, &usbhid->iofl);
917
918 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
919 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
920 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
921 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
922
923 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
924 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
925
926 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
927
928 if (insize > HID_MAX_BUFFER_SIZE)
929 insize = HID_MAX_BUFFER_SIZE;
930
931 if (hid_alloc_buffers(dev, hid)) {
932 ret = -ENOMEM;
933 goto fail;
934 }
935
936 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
937 struct usb_endpoint_descriptor *endpoint;
938 int pipe;
939 int interval;
940
941 endpoint = &interface->endpoint[n].desc;
942 if (!usb_endpoint_xfer_int(endpoint))
943 continue;
944
945 interval = endpoint->bInterval;
946
947 /* Some vendors give fullspeed interval on highspeed devides */
948 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
949 dev->speed == USB_SPEED_HIGH) {
950 interval = fls(endpoint->bInterval*8);
951 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
952 hid->name, endpoint->bInterval, interval);
953 }
954
955 /* Change the polling interval of mice. */
956 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
957 interval = hid_mousepoll_interval;
958
959 ret = -ENOMEM;
960 if (usb_endpoint_dir_in(endpoint)) {
961 if (usbhid->urbin)
962 continue;
963 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
964 goto fail;
965 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
966 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
967 hid_irq_in, hid, interval);
968 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
969 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
970 } else {
971 if (usbhid->urbout)
972 continue;
973 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
974 goto fail;
975 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
976 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
977 hid_irq_out, hid, interval);
978 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
979 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
980 }
981 }
982
983 init_waitqueue_head(&usbhid->wait);
984 INIT_WORK(&usbhid->reset_work, hid_reset);
985 INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
986 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
987
988 spin_lock_init(&usbhid->lock);
989 spin_lock_init(&usbhid->lock);
990
991 usbhid->intf = intf;
992 usbhid->ifnum = interface->desc.bInterfaceNumber;
993
994 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
995 if (!usbhid->urbctrl) {
996 ret = -ENOMEM;
997 goto fail;
998 }
999
1000 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
1001 usbhid->ctrlbuf, 1, hid_ctrl, hid);
1002 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
1003 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
1004 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
1005
1006 usbhid_init_reports(hid);
1007 hid_dump_device(hid);
1008
1009 set_bit(HID_STARTED, &usbhid->iofl);
1010
1011 /* Some keyboards don't work until their LEDs have been set.
1012 * Since BIOSes do set the LEDs, it must be safe for any device
1013 * that supports the keyboard boot protocol.
1014 */
1015 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
1016 interface->desc.bInterfaceProtocol ==
1017 USB_INTERFACE_PROTOCOL_KEYBOARD)
1018 usbhid_set_leds(hid);
1019
1020 return 0;
1021
1022 fail:
1023 usb_free_urb(usbhid->urbin);
1024 usb_free_urb(usbhid->urbout);
1025 usb_free_urb(usbhid->urbctrl);
1026 usbhid->urbin = NULL;
1027 usbhid->urbout = NULL;
1028 usbhid->urbctrl = NULL;
1029 hid_free_buffers(dev, hid);
1030 return ret;
1031 }
1032
1033 static void usbhid_stop(struct hid_device *hid)
1034 {
1035 struct usbhid_device *usbhid = hid->driver_data;
1036
1037 if (WARN_ON(!usbhid))
1038 return;
1039
1040 clear_bit(HID_STARTED, &usbhid->iofl);
1041 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1042 set_bit(HID_DISCONNECTED, &usbhid->iofl);
1043 spin_unlock_irq(&usbhid->lock);
1044 usb_kill_urb(usbhid->urbin);
1045 usb_kill_urb(usbhid->urbout);
1046 usb_kill_urb(usbhid->urbctrl);
1047
1048 hid_cancel_delayed_stuff(usbhid);
1049
1050 if (hid->claimed & HID_CLAIMED_INPUT)
1051 hidinput_disconnect(hid);
1052 if (hid->claimed & HID_CLAIMED_HIDDEV)
1053 hiddev_disconnect(hid);
1054 if (hid->claimed & HID_CLAIMED_HIDRAW)
1055 hidraw_disconnect(hid);
1056
1057 hid->claimed = 0;
1058
1059 usb_free_urb(usbhid->urbin);
1060 usb_free_urb(usbhid->urbctrl);
1061 usb_free_urb(usbhid->urbout);
1062 usbhid->urbin = NULL; /* don't mess up next start */
1063 usbhid->urbctrl = NULL;
1064 usbhid->urbout = NULL;
1065
1066 hid_free_buffers(hid_to_usb_dev(hid), hid);
1067 }
1068
1069 static int usbhid_power(struct hid_device *hid, int lvl)
1070 {
1071 int r = 0;
1072
1073 switch (lvl) {
1074 case PM_HINT_FULLON:
1075 r = usbhid_get_power(hid);
1076 break;
1077 case PM_HINT_NORMAL:
1078 usbhid_put_power(hid);
1079 break;
1080 }
1081 return r;
1082 }
1083
1084 static struct hid_ll_driver usb_hid_driver = {
1085 .parse = usbhid_parse,
1086 .start = usbhid_start,
1087 .stop = usbhid_stop,
1088 .open = usbhid_open,
1089 .close = usbhid_close,
1090 .power = usbhid_power,
1091 .hidinput_input_event = usb_hidinput_input_event,
1092 };
1093
1094 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1095 {
1096 struct usb_host_interface *interface = intf->cur_altsetting;
1097 struct usb_device *dev = interface_to_usbdev(intf);
1098 struct usbhid_device *usbhid;
1099 struct hid_device *hid;
1100 unsigned int n, has_in = 0;
1101 size_t len;
1102 int ret;
1103
1104 dbg_hid("HID probe called for ifnum %d\n",
1105 intf->altsetting->desc.bInterfaceNumber);
1106
1107 for (n = 0; n < interface->desc.bNumEndpoints; n++)
1108 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
1109 has_in++;
1110 if (!has_in) {
1111 dev_err(&intf->dev, "couldn't find an input interrupt "
1112 "endpoint\n");
1113 return -ENODEV;
1114 }
1115
1116 hid = hid_allocate_device();
1117 if (IS_ERR(hid))
1118 return PTR_ERR(hid);
1119
1120 usb_set_intfdata(intf, hid);
1121 hid->ll_driver = &usb_hid_driver;
1122 hid->hid_output_raw_report = usbhid_output_raw_report;
1123 hid->ff_init = hid_pidff_init;
1124 #ifdef CONFIG_USB_HIDDEV
1125 hid->hiddev_connect = hiddev_connect;
1126 hid->hiddev_hid_event = hiddev_hid_event;
1127 hid->hiddev_report_event = hiddev_report_event;
1128 #endif
1129 hid->dev.parent = &intf->dev;
1130 hid->bus = BUS_USB;
1131 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1132 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1133 hid->name[0] = 0;
1134 if (intf->cur_altsetting->desc.bInterfaceProtocol ==
1135 USB_INTERFACE_PROTOCOL_MOUSE)
1136 hid->type = HID_TYPE_USBMOUSE;
1137
1138 if (dev->manufacturer)
1139 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1140
1141 if (dev->product) {
1142 if (dev->manufacturer)
1143 strlcat(hid->name, " ", sizeof(hid->name));
1144 strlcat(hid->name, dev->product, sizeof(hid->name));
1145 }
1146
1147 if (!strlen(hid->name))
1148 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1149 le16_to_cpu(dev->descriptor.idVendor),
1150 le16_to_cpu(dev->descriptor.idProduct));
1151
1152 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1153 strlcat(hid->phys, "/input", sizeof(hid->phys));
1154 len = strlen(hid->phys);
1155 if (len < sizeof(hid->phys) - 1)
1156 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1157 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1158
1159 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1160 hid->uniq[0] = 0;
1161
1162 usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1163 if (usbhid == NULL) {
1164 ret = -ENOMEM;
1165 goto err;
1166 }
1167
1168 hid->driver_data = usbhid;
1169 usbhid->hid = hid;
1170
1171 ret = hid_add_device(hid);
1172 if (ret) {
1173 if (ret != -ENODEV)
1174 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1175 goto err_free;
1176 }
1177
1178 return 0;
1179 err_free:
1180 kfree(usbhid);
1181 err:
1182 hid_destroy_device(hid);
1183 return ret;
1184 }
1185
1186 static void hid_disconnect(struct usb_interface *intf)
1187 {
1188 struct hid_device *hid = usb_get_intfdata(intf);
1189 struct usbhid_device *usbhid;
1190
1191 if (WARN_ON(!hid))
1192 return;
1193
1194 usbhid = hid->driver_data;
1195 hid_destroy_device(hid);
1196 kfree(usbhid);
1197 }
1198
1199 static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
1200 {
1201 del_timer_sync(&usbhid->io_retry);
1202 cancel_work_sync(&usbhid->restart_work);
1203 cancel_work_sync(&usbhid->reset_work);
1204 }
1205
1206 static void hid_cease_io(struct usbhid_device *usbhid)
1207 {
1208 del_timer(&usbhid->io_retry);
1209 usb_kill_urb(usbhid->urbin);
1210 usb_kill_urb(usbhid->urbctrl);
1211 usb_kill_urb(usbhid->urbout);
1212 }
1213
1214 /* Treat USB reset pretty much the same as suspend/resume */
1215 static int hid_pre_reset(struct usb_interface *intf)
1216 {
1217 struct hid_device *hid = usb_get_intfdata(intf);
1218 struct usbhid_device *usbhid = hid->driver_data;
1219
1220 spin_lock_irq(&usbhid->lock);
1221 set_bit(HID_RESET_PENDING, &usbhid->iofl);
1222 spin_unlock_irq(&usbhid->lock);
1223 cancel_work_sync(&usbhid->restart_work);
1224 hid_cease_io(usbhid);
1225
1226 return 0;
1227 }
1228
1229 /* Same routine used for post_reset and reset_resume */
1230 static int hid_post_reset(struct usb_interface *intf)
1231 {
1232 struct usb_device *dev = interface_to_usbdev (intf);
1233 struct hid_device *hid = usb_get_intfdata(intf);
1234 struct usbhid_device *usbhid = hid->driver_data;
1235 int status;
1236
1237 spin_lock_irq(&usbhid->lock);
1238 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
1239 spin_unlock_irq(&usbhid->lock);
1240 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1241 status = hid_start_in(hid);
1242 if (status < 0)
1243 hid_io_error(hid);
1244 usbhid_restart_queues(usbhid);
1245
1246 return 0;
1247 }
1248
1249 int usbhid_get_power(struct hid_device *hid)
1250 {
1251 struct usbhid_device *usbhid = hid->driver_data;
1252
1253 return usb_autopm_get_interface(usbhid->intf);
1254 }
1255
1256 void usbhid_put_power(struct hid_device *hid)
1257 {
1258 struct usbhid_device *usbhid = hid->driver_data;
1259
1260 usb_autopm_put_interface(usbhid->intf);
1261 }
1262
1263
1264 #ifdef CONFIG_PM
1265 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1266 {
1267 struct hid_device *hid = usb_get_intfdata(intf);
1268 struct usbhid_device *usbhid = hid->driver_data;
1269 struct usb_device *udev = interface_to_usbdev(intf);
1270 int status;
1271
1272 if (udev->auto_pm) {
1273 spin_lock_irq(&usbhid->lock); /* Sync with error handler */
1274 if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
1275 && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
1276 && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
1277 && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
1278 && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
1279 && (!usbhid->ledcount || ignoreled))
1280 {
1281 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1282 spin_unlock_irq(&usbhid->lock);
1283 } else {
1284 usbhid_mark_busy(usbhid);
1285 spin_unlock_irq(&usbhid->lock);
1286 return -EBUSY;
1287 }
1288
1289 } else {
1290 spin_lock_irq(&usbhid->lock);
1291 set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1292 spin_unlock_irq(&usbhid->lock);
1293 if (usbhid_wait_io(hid) < 0)
1294 return -EIO;
1295 }
1296
1297 if (!ignoreled && udev->auto_pm) {
1298 spin_lock_irq(&usbhid->lock);
1299 if (test_bit(HID_LED_ON, &usbhid->iofl)) {
1300 spin_unlock_irq(&usbhid->lock);
1301 usbhid_mark_busy(usbhid);
1302 return -EBUSY;
1303 }
1304 spin_unlock_irq(&usbhid->lock);
1305 }
1306
1307 hid_cancel_delayed_stuff(usbhid);
1308 hid_cease_io(usbhid);
1309
1310 if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
1311 /* lost race against keypresses */
1312 status = hid_start_in(hid);
1313 if (status < 0)
1314 hid_io_error(hid);
1315 usbhid_mark_busy(usbhid);
1316 return -EBUSY;
1317 }
1318 dev_dbg(&intf->dev, "suspend\n");
1319 return 0;
1320 }
1321
1322 static int hid_resume(struct usb_interface *intf)
1323 {
1324 struct hid_device *hid = usb_get_intfdata (intf);
1325 struct usbhid_device *usbhid = hid->driver_data;
1326 int status;
1327
1328 if (!test_bit(HID_STARTED, &usbhid->iofl))
1329 return 0;
1330
1331 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1332 usbhid_mark_busy(usbhid);
1333
1334 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
1335 test_bit(HID_RESET_PENDING, &usbhid->iofl))
1336 schedule_work(&usbhid->reset_work);
1337 usbhid->retry_delay = 0;
1338 status = hid_start_in(hid);
1339 if (status < 0)
1340 hid_io_error(hid);
1341 usbhid_restart_queues(usbhid);
1342
1343 dev_dbg(&intf->dev, "resume status %d\n", status);
1344 return 0;
1345 }
1346
1347 static int hid_reset_resume(struct usb_interface *intf)
1348 {
1349 struct hid_device *hid = usb_get_intfdata(intf);
1350 struct usbhid_device *usbhid = hid->driver_data;
1351
1352 clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
1353 return hid_post_reset(intf);
1354 }
1355
1356 #endif /* CONFIG_PM */
1357
1358 static struct usb_device_id hid_usb_ids [] = {
1359 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1360 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1361 { } /* Terminating entry */
1362 };
1363
1364 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1365
1366 static struct usb_driver hid_driver = {
1367 .name = "usbhid",
1368 .probe = hid_probe,
1369 .disconnect = hid_disconnect,
1370 #ifdef CONFIG_PM
1371 .suspend = hid_suspend,
1372 .resume = hid_resume,
1373 .reset_resume = hid_reset_resume,
1374 #endif
1375 .pre_reset = hid_pre_reset,
1376 .post_reset = hid_post_reset,
1377 .id_table = hid_usb_ids,
1378 .supports_autosuspend = 1,
1379 };
1380
1381 static const struct hid_device_id hid_usb_table[] = {
1382 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1383 { }
1384 };
1385
1386 static struct hid_driver hid_usb_driver = {
1387 .name = "generic-usb",
1388 .id_table = hid_usb_table,
1389 };
1390
1391 static int __init hid_init(void)
1392 {
1393 int retval = -ENOMEM;
1394
1395 resumption_waker = create_freezeable_workqueue("usbhid_resumer");
1396 if (!resumption_waker)
1397 goto no_queue;
1398 retval = hid_register_driver(&hid_usb_driver);
1399 if (retval)
1400 goto hid_register_fail;
1401 retval = usbhid_quirks_init(quirks_param);
1402 if (retval)
1403 goto usbhid_quirks_init_fail;
1404 retval = hiddev_init();
1405 if (retval)
1406 goto hiddev_init_fail;
1407 retval = usb_register(&hid_driver);
1408 if (retval)
1409 goto usb_register_fail;
1410 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1411 DRIVER_DESC "\n");
1412
1413 return 0;
1414 usb_register_fail:
1415 hiddev_exit();
1416 hiddev_init_fail:
1417 usbhid_quirks_exit();
1418 usbhid_quirks_init_fail:
1419 hid_unregister_driver(&hid_usb_driver);
1420 hid_register_fail:
1421 destroy_workqueue(resumption_waker);
1422 no_queue:
1423 return retval;
1424 }
1425
1426 static void __exit hid_exit(void)
1427 {
1428 usb_deregister(&hid_driver);
1429 hiddev_exit();
1430 usbhid_quirks_exit();
1431 hid_unregister_driver(&hid_usb_driver);
1432 destroy_workqueue(resumption_waker);
1433 }
1434
1435 module_init(hid_init);
1436 module_exit(hid_exit);
1437
1438 MODULE_AUTHOR(DRIVER_AUTHOR);
1439 MODULE_DESCRIPTION(DRIVER_DESC);
1440 MODULE_LICENSE(DRIVER_LICENSE);
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